81 citations · 96 across the 2 of their papers we have counts for
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The circumstellar envelope of IRC+10216 from milli-arcsecond to arcmin scales
I. C. Leao, Patrick De Laverny, D. Mekarnia +2
Aims.Analysis of the innermost regions of the carbon-rich star IRC+10216 and of the outer layers of its circumstellar envelope have been performed in order to constrain its mass-lo…
A snapshot of the inner dusty regions of a RCrB-type variable
I. C. Leao, Patrick De Laverny, O. Chesneau +2
R Coronae Borealis variable stars are suspected to sporadically eject optically thick dust clouds causing, when one of them lies on the line-of-sight, a huge brightness decline in…
Dust temperature and density profiles of AGB and post-AGB stars from mid-infrared observations
Eric Lagadec, Djamel Mekarnia, Jose Antonio De Freitas Pacheco +1
First mid-infrared images of a sample of AGB and post-AGB carbon stars (V Hya, IRC +10216, CIT 6 and Roberts 22) obtained at La Silla Observatory (ESO, Chile) are reported. CIT 6 p…
First detection of dust clouds around R CrB variable stars
Patrick De Laverny, Djamel Mekarnia
From VLT/NACO diffraction-limited images of RY~Sgr, we report the first direct detection of heterogeneities in the circumstellar envelope of a R Coronae Borealis variable star. Sev…